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DC Field | Value | Language |
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dc.citation.endPage | 1921 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 1913 | - |
dc.citation.title | PROCEEDINGS OF THE COMBUSTION INSTITUTE | - |
dc.citation.volume | 38 | - |
dc.contributor.author | Van, Kyu Ho | - |
dc.contributor.author | Oh, Suhyeon | - |
dc.contributor.author | Cha, Min Suk | - |
dc.contributor.author | Yoo, Chun Sang | - |
dc.contributor.author | Pakr, Jeong | - |
dc.contributor.author | Chung, Suk Ho | - |
dc.date.accessioned | 2023-12-21T16:08:31Z | - |
dc.date.available | 2023-12-21T16:08:31Z | - |
dc.date.created | 2020-09-08 | - |
dc.date.issued | 2021-04 | - |
dc.description.abstract | Stabilization characteristics of laminar lifted jet flames in a coflow were investigated experimentally to elucidate the effect of Schmidt number in methane and ethylene fuels diluted with N 2 , He, and Ar. A nonmonotonic (decreasing and then increasing) liftoff height ( H L ) behavior with jet velocity ( U 0 ) was observed previously for methane fuel diluted with N 2 . To further elucidate the fuel Schmidt number (Sc F ) effect in exhibiting such a non-monotonic (U-shaped) behavior, various diluents (N 2 , He, and Ar) were added to the fuel streams and methane and/or ethylene fuels were used. The result showed three flame types in terms of Sc F and fuel density; nozzle-attached flame, stationary lifted flame, and oscillating flame. Among stationary lifted flames, two distinct H L behaviors with U 0 were observed; monotonic and non-monotonic H L behaviors. A critical Schmidt number (Sc F,cr1 ) existed over which monotonically increasing behavior was observed. A second critical Schmidt number (Sc F,cr2 ) also existed such that U-shaped behavior was observed for Sc F,cr2 < Sc F < Sc F,cr1 . An oscillating lifted flame was observed for Sc F < Sc F,cr2 . The oscillating and stationary lifted flames can be categorized in terms of the density differences among the fuel, air, and burnt gas. For the increasing H L cases (including the increasing regime in U-shaped behavior), H L behavior can be characterized in terms of Sc F , the density difference between fuel and air, Sc F,cr1 , and U 0 . While the decreasing H L regime in the U-shaped behavior can be characterized with Sc F and/or the Richardson number (defined based on the density difference between fuel and air). Oscillating flames were observed with the frequency range of 2.1 & ndash;2.7 Hz by the repetitive action of positive (by burnt gas) and negative (when the fuel heavier than air) buoyancies. | - |
dc.identifier.bibliographicCitation | PROCEEDINGS OF THE COMBUSTION INSTITUTE, v.38, no.2, pp.1913 - 1921 | - |
dc.identifier.doi | 10.1016/j.proci.2020.06.344 | - |
dc.identifier.issn | 1540-7489 | - |
dc.identifier.scopusid | 2-s2.0-85090999778 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/48049 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S1540748920304375?via%3Dihub | - |
dc.identifier.wosid | 000651831800002 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE INC | - |
dc.title | Effects of Schmidt number on non-monotonic liftoff height behavior in laminar coflow-jet flames with diluted methane and ethylene | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Thermodynamics; Energy & Fuels; Engineering, Chemical; Engineering, Mechanical | - |
dc.relation.journalResearchArea | Thermodynamics; Energy & Fuels; Engineering | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Lifted flame | - |
dc.subject.keywordAuthor | Coflow jet | - |
dc.subject.keywordAuthor | Schmidt number | - |
dc.subject.keywordAuthor | Buoyancy | - |
dc.subject.keywordAuthor | Edge flame | - |
dc.subject.keywordPlus | OSCILLATING LIFTED FLAMES | - |
dc.subject.keywordPlus | TRIBRACHIAL FLAMES | - |
dc.subject.keywordPlus | SELF-EXCITATION | - |
dc.subject.keywordPlus | STABILIZATION | - |
dc.subject.keywordPlus | PROPAGATION | - |
dc.subject.keywordPlus | EDGE | - |
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